Originally Posted by
illjustride
Thanks for the tip. I measured my ENVE Gravel bars that are 44cm with the string technique and they are 43 1/2 inches or 110.5cm. Now in terms of the EW JC130 Y-cable, which length would work best? They have odd lengths like (550/550/50), (450,350,50) & (250,350,50)? A bit confusing. I would love some help with this.
Did you watch the video from rides of japan youtube channel? You don’t really need the Y-cable from shimano to use the bar end junction box. But if you really want to use it, the numbers represent how long (in mms) each leg of Y is for the cable you want to buy. I believe theres a review on Amazon people mention what fits comfortably in what size of bars.
you will probably need a 200 mm (or slightly longer) single cable from bar end junction to your brifter, then a 350/250/150*. For those numbers, 350 goes to left brifter, 250 goes to right brifter, and 150 exits the handle bar near the stem (usually from the 250 side) and connects to an “inline” junction or ew111 Bluetooth/ANT+ unit. So, in theory, if there was a 350/250/1000 Y-cable, you could actually take the 1000 all the way down to bottom bracket to connect to the B junction if you were so inclined.
*(I’m making up all numbers to give you an idea on what the numbers mean in practice, I don’t remember exact sizes Y-cables come in)
If you want, read the manuals on Di2 center. They should give you a better idea with visuals to go with them.